PARAMAGNETIC SPECTRAL RESPONSE OF CEPD3 - A COMPARATIVE INVESTIGATIONOF NEUTRON INELASTIC-SCATTERING FROM SINGLE-CRYSTAL AND POLYCRYSTALLINE SAMPLES

We report a comparative neutron inelastic-scattering study of single-c rystal and polycrystalline samples of CePd3 with the aim to resolve co nflicting claims concerning the form of the paramagnetic spectral resp onse of the compound. The present measurements show that the inelastic scattering particularly at low scattering angles is very similar for both samples. We find also that the observed scattering at energies be low 30 meV is mostly nonmagnetic. At low angles it is dominated by mul tiple-scattering processes in the relatively large samples used for th e measurements. Magnetic scattering occurs predominantly at high energ ies and can be represented by a single-ion spectral function centered on a characteristic energy of similar to 50-55 meV, in good accord wit h previous findings from time-of-flight and polarized neutron measurem ents on a triple-axis spectrometer.